* src/ltlast/binop.cc, src/ltlast/binop.cc: Add support for
these new operators.
* src/ltlparse/ltlparse.yy, src/ltlparse/ltlscan.ll: Parse them.
* src/ltltest/reduccmp.test: Add new tests for W and M.
* src/ltlvisit/basicreduce.cc, src/ltlvisit/contain.cc,
src/ltlvisit/lunabbrev.cc, src/ltlvisit/nenoform.cc,
src/ltlvisit/randomltl.cc, src/ltlvisit/randomltl.hh,
src/ltlvisit/reduce.cc, src/ltlvisite/simpfg.cc,
src/ltlvisit/simpfg.hh, src/ltlvisit/syntimpl.cc,
src/ltlvisit/tostring.cc, src/tgba/formula2bdd.cc,
src/tgbaalgos/eltl2tgba_lacim.cc, src/tgbaalgos/ltl2taa.cc,
src/tgbaalgos/ltl2tgba_fm.cc, src/tgbaalgos/ltl2tgba_lacim.cc:
Add support for W and M.
* src/tgbatest/ltl2neverclaim.test: Test never claim output
using LBTT, this is more thorough. Also we cannot use -N
any more in the spotlbtt.test.
* src/tgbatests/ltl2tgba.cc: Define M and W for ELTL.
* src/tgbatest/ltl2neverclaim.test: Test W and M, and use
-DS instead of -N, because lbtt-translate does not want
to translate these operators for tools that masquerade as Spin.
* src/ltlvisit/Makefile.am (ltlvisit_HEADERS,
libltlvisit_la_SOURCES): Distribute them.
* src/ltltest/randltl.cc: New file.
* src/ltltest/Makefile.am (LDADD): Link with ../libspot.la directly.
(noinst_PROGRAMS, randltl_SOURCES): New.
(EXTRA_DIST, CLEANFILES): The list of random formulae is now generated.
* src/ltltest/formulae.txt: Delete.
* src/ltltest/reduc.test: Use randltl to generate formulae.
* src/ltlvisit/length.cc (length_visitor): Fix computation
of the length of multops.
* src/ltlvisit/length.hh (length): Document the length of multops.
